Abstract: A support member (2), on which the object is intended to rest, and a base member (1) which carries the support member. The base member (1) consists mainly of a fixed frame (6) and an expanding column (9) hinged to the frame which carries the support member (2). The column by expansion or contraction can raise or lower the support member. Between the frame and the column is attached a control contrivance (13) for positioning the column between different swing positions. At a lower end position, in which the support-member is to a high degree obliquely positioned, the member can connect with a unit at a lower level, from which the workpiece can be lifted to a desired higher level. The support member also has elements (28) to ensure that the workpiece is held securely in position in all support-member attitudes.